Nonetheless, Time Lords could absorb, withstand and expel great doses of certain types of radiation; the Tenth Doctor said he used to play with roentgen bricks in the nursery. (TV: Smith and Jones) Although this is not the case for humans, as they can be rendered sterile if a lead apron is not given to them.

Other species could absorb and regenerate with it, such as the Kastrians (TV: The Hand of Fear) and the Daleks on Skaro, whose evolution led to them becoming dependent on a constant supply of radiation. (TV: The Daleks) Following the Daleks' defeat by the First Doctor and his companions, the incubation level of their city was automatically sealed off with the Dalek Supreme and the gestating embryos being placed in suspended animation. As a result of the decades that they spent in the radiation free environment, the Daleks overcame their dependance on it. (AUDIO: Return to Skaro)

Nevertheless, radiation could still prove harmful to the Daleks. When "Rusty" was damaged, a crack in his power supply began leaking trionic radiation that began killing him and affected his mind, turning him into a "good Dalek." When the Twelfth Doctor stopped the radiation leak, Rusty immediately returned to normal. (TV: Into the Dalek)

The Cybermen showed a weakness to radiation, which Ben Jackson and the team at the base Snowcap used to their advantage when the Cybermen invaded Earth in 1986. The radiation in the chamber of the Z-Bomb instantly affected them so they could not ensure the bomb was dismantled before their home planetMondas was destroyed. (TV: The Tenth Planet)

On the planetJanus Prime, radiation made the sand glow blue. It also destroyed a human body's lipids, making skin sticky to the touch and changing to a jelly-like texture. Upon death, the body lost cohesion and collapsed into a porridge-like substance. (PROSE: The Janus Conjunction)

On Dulkis, the Dulcians irradiated an island to see the effects. When the Dominators landed there, they absorbed the radiation from the island into a storage tank, allowing them free access to the area. (TV: The Dominators)

The Sixth Doctor noticed a suspicious presence of radiation near the planet Lakertya and avoided it. However, his future self sent a psychic signal to him to go there despite the unknown danger, setting in motion a plan to stop the Valeyard and free himself from the influence of the Nathemus through his own demise. He regenerated due to the radiation exposure, which was actually being released from several beams fired on the TARDIS by the Rani - a kind not lethal to humans, only causing his then-companion Melanie Bush to pass out, but indeed lethal to Time Lords, resulting in his death. (AUDIO: The Brink of Death, TV: Time and the Rani)

Owen Harper died after he was exposed to a radiation fallout at a nuclear power plant in Cardiff. He was able to stop the fallout from reaching the rest of Cardiff with help from Toshiko Sato who shortly died after from her own injuries. (TV: Exit Wounds)

The ruins of Klimtenburg's church became irradiated after a Cyber-ship crashed into it and the housing of the reactor shattered. The reactor shut down so it was not too severe but the villagers, being from the 19th century, were unaware of the danger and collected pieces of the reactor which they made into jewellery. (PROSE: Plague of the Cybermen)